Magnolia Broadband Inc.

Google Inc.

Magnotod LLC

Magnolia Brandband Inc.

Haim Harel

Kenneth Kludt

Phil Chen

Sherwin J Wang

Eduardo Abreu

Yair Karmi

Stuart Sanders Jeffery

Yingxue K Li

Alexander Segalovitz

William Reinisch

Thorp Rivingston

Wei Sun

Phil F Chen

Qing Li

Phil Fu-Wei Chen

Mark F Kahn

Ming Yang

Amos Baron

Wai Hon Lo

Dilek Barlas

Xingxue Li

Kenneth A Kludt

Systems and methods of scheduling data for transmission from an access point 'AP' to a station in a system of multiple co-located APs may include determining whether the station is also able to receive transmitted data from another of the multiple co-located APs. If the determining is negative the data is transmitted but if the determination is positive, the data may be transmitted only after ascertaining that exclusive permission to transmit the data to the station has been granted to the AP.

System and method for cooperative scheduling for co-located access points

A method and apparatus has been developed to reduce SAR for a mobile device by designing appropriate matching circuits between each antenna and its power amplifier. In the presence of such matching circuits the normal phase adjustments may be carried out to provide a preferred safe SAR level that can be maintained during phase adjustment without sacrificing TRP.

Controlling MTD antenna VSWR and coupling for SAR control

A wireless communication system may include a plurality of co-located transceivers. The plurality of transceivers may be configured to transmit data to at least one user equipment, according to a collision sense multiple access/collision avoidance (CSMA/CA) protocol. A processor may receive a signal preamble and a sender address of the signal preamble and determine whether the sender address is included in the stored list of addresses. If the sender address is included in the stored list of addresses, the processor may allow simultaneous data transmission from two or more of the co-located transceivers.

System and method for co-located and co-channel Wi-Fi access points

A Wi-Fi radio distribution network (RDN) station is provided for use in a wireless communications network comprising a plurality of wireless stations. The Wi-Fi RDN station comprises a multiple-input-multiple-output (MIMO) receiving system configured to operate in accordance with a channel estimation MIMO receiving scheme; and a RDN connected to the MIMO receiving system. The RDN comprises at least one beamformer arranged to be fed by two or more antennas, wherein each of the beamformers includes a combiner configured to combine signals coming from a plurality of antennas associated with the respective beamformer into a single signal. The MIMO receiving system is configured to perform one or both of channel estimation using a single antenna or beamforming. Both channel estimation and beamforming may be based on one or more packets addressed to one or more wireless stations in the communications network other than the Wi-Fi RDN station.

Wi-Fi radio distribution network stations and method of operating Wi-Fi RDN stations

Embodiments of the present invention describe methods for increasing the amount of information available to a mobile transmit diversity transmitter during soft handoff. According to embodiments of the invention, a transmit diversity transmitter may determine substantially when it is in uplink communication with one base station and downlink communication with another base station. The mobile device may transmitting a diversity signal by controlling a value of a transmit diversity parameter based on feedback signals from the downlink base station, and controlling a power level in accordance with a standard protocol, e.g. combination of transmit power control feedbacks provided by the active base stations.

Using multiple and a single feedback for UE uplink beamforming in soft handoff

A system and method for providing multi-beam Wi-Fi access points. The system includes one or more Wi-Fi transmit antennas beamformers; one or more Wi-Fi receive antennas or receive beamformers; and a number N of co-channel Wi-Fi access points (APs) and a number of M non co-channel APS, where all APs comply with IEEE802.11xx standard, connected to the Wi-Fi transmit antennas beamformers, wherein the Wi-Fi transmit antennas beamformers are configured to produce a plurality of non spatially adjacent beams of a common frequency, directed at a plurality of Wi-Fi user equipment (UE) such that the directional beams are sufficiently isolated from each other, and at least some of the Wi-Fi UEs communicate simultaneously with the plurality of Wi-Fi access points.

Multi-beam co-channel Wi-Fi access point

In a cell phone telecommunication system having a macrocell and a small cell coextensive with or adjacent to the macrocell and sharing a common frequency band, interference can occur between a user device operating in the small cell, the local base station operating the user devices in the small cell on one hand and another user device serviced by a main base station for the macrocell. In order to reduce this interference, the shape of the transmission beam from at least one of the user devices or base stations is shaped into a narrow beam steered to be directed at the respective receiving unit. Alternatively, the shape of the transmission beam has a null point and the beam is steered so that its null point is directed toward the affected unit.

Method and apparatus for adaptive reduction of interference in a small cell of a mobile telecommunication system

A system for selecting optimal phase combinations for RF beamformers in a MIMO hybrid receiving systems augmented by RF Distribution Network. The system addresses the issue of providing beamforming gains for a plurality of layers using one common set of weights for each beamformer. The specification may be based on channel estimation of all layers as viewed by all receiving antennas, and maximizing metrics that capture the total received power.

Beamformer phase optimization for a multi-layer MIMO system augmented by radio distribution network

A system and method may include a plurality of transmit and receive antennas covering one sector of a cellular communication base station; a multi-beam RF beamforming matrix connected to the transmit and receive antennas; a plurality of radio circuitries connected to the multi-beam RF beamforming matrix; and a baseband module connected to the radio circuitries. The multi-beam RF beamforming matrix may be configured to generate one sector beam and two or more directional co-frequency beams pointed at user equipment (UEs) within the sector, as instructed by the baseband module. A number M denotes the number the directional beams and a number N denotes the number of the radio circuitries and wherein M&#x3e;N.

Multi-beam MIMO time division duplex base station using subset of radios

A system and method for selective registration of a user equipment (UE) to one of a plurality of access points (APs). An indication may be received that each of a plurality of APs have received a signal from a UE. The UE may be registered to the first one of the plurality of APs to satisfy registration requirements associated with the UE. Information may be reported to a controller related to the signal strength of communication received at each AP from the UE. If the signal strength received at the registered AP is less than the signal strength received at one or more of the non-registered APs by more than a threshold amount, the registration of the UE to the registered AP may be rejected.

System and method for selective registration in a multi-beam system

A system and method for overriding Carrier-Sense-Multiple-Access/Collision-Avoidance (CSMA/CA) and virtual carrier sense, without harming the traffic that occupies the channel is described herein. Further provided herein are measurements and qualifying criteria for performing the aforementioned channel sharing. The system and method may be based, for example, on opportunistic spatial isolation of nodes from each other and selectively implementing ultra-fast link adaptation.

System and method for simultaneous co-channel access of neighboring access points

A system that implements multi user multiple inputs multiple outputs (MU MIMO) base station using a plurality of co-located single-user (SU) MIMO base stations is provided herein. The system may include a number N co-located single-user multiple input multiple output (SU-MIMO) bases stations each having a number K MIMO rank, wherein said N co-located SU-MIMO base stations are configured to share a common antennas array, operating over a common frequency band; a front-end MIMO processor connected to said N co-located SU-MIMO base stations and further coupleable to said common antennas array; and a back-end coordinator configured to collaboratively assist in optimizing operation of said N co-located SU-MIMO base stations, such that said N co-located SU-MIMO base stations and said front-end MIMO processor collaboratively implement a multi-user multiple input multiple output (MU-MIMO) base station capable of dynamically separating a coverage area into N*K spatial channels.

Implementing multi user multiple input multiple output (MU MIMO) base station using single-user (SU) MIMO co-located base stations

A method and system for calibrating transmit and receive antenna patterns for time division duplex (TDD) is described. A station in a communications network comprises at least two antennas configured to operate together for both transmitting and receiving modes. A phase setting difference between the transmit and receive antenna patterns may be determined and used to determine a relative amplitude setting for the transmit antenna pattern and/or a relative amplitude setting for the receive antenna pattern.

System and method for transmit and receive antenna patterns calibration for time division duplex (TDD) systems

A system and method for backhaul based explicit sounding feedback of 802.11 AP to AP channel state information (CSI) so that inter AP interference can be reduced and multiple APs transmissions that can occur simultaneously on the same radio channel. A modification may be made to APs such that they can accurately measure the CSI between them that in turn enables their respective beamformer to create pattern nulls toward each other while simultaneously developing pattern enhancements toward their intended station. An AP may send a sounding packet to its associated STAs, poll explicit feedbacks from STAs and receive backhaul CSI feedbacks from neighboring APs. There is no additional Wi-Fi overhead in physical layer. Backhaul feedback link is established through direct peer-to-peer (P2P) link which bypassed the sounding controller to reduce CSI feedback delay.

System and method for backhaul based sounding feedback

A method for modifying a signal transmitted from a mobile communication device comprising perturbing a transmit diversity parameter from its nominal value by modulating the parameter with respect to the nominal value in alternating directions, receiving a feedback signal including feedback information relating to the modified signal as received at a feedback device, and based at least on the feedback information, adjusting the nominal value of the transmit diversity parameter by increasing, decreasing, or preserving the nominal value. The perturbations are selected to minimize phase discontinuities.

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New York, NY, United States of America

Haim Harel